The Hike Full Cushion Crew socks, (formerly PhD® Outdoor), use cushioning on the entire sock to help maximise warmth and protection. These responsibly sourced, ZQ-certified Merino wool hike socks are built with the top sock tech, including Indestructawool™ technology for enhanced durability, the 4 Degree™ Elite Fit System for a dialled-in, performance-oriented fit, and our Virtually Seamless™ toe for maximum in-shoe/boot comfort. Smartwool have updated the hike line by improving mesh zones for additional breathability, as well as creating a new ply structure that reduces pilling while enhancing hand-feel and comfort. Not to mention, the best-feeling, best-fitting hiking socks are now made with recycled nylon—making these socks more sustainable than ever. Now that's something you can feel good in and about.Benefits4 Degree™ Elite Fit SystemFor a dialed, performance-oriented fit with flex zone at ankle jointFull CushionCushioning on the entire sock for added protection and warmth.Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfortMade in the USAVirtually Seamless™ ToeSmoothed out toe seams for ultimate in-shoe fit and comfortFeaturesSock Height: Crew4 Degree™ elite fit system for a dialed-in, performance-oriented fitAdditional body-mapped mesh zones for added breathabilityVirtually Seamless™ toe for enhanced comfortIndestructawool™ technology with extended durability zonesComfort welt with 'stay put' fitHeight 8"Made in USA of Imported Yarn: 56% Merino Wool, 11% Nylon, 31% Recycled Nylon, 2% ElastaneCareMachine Wash Warm Gentle Cycle.Do Not BleachDo Not IronDo Not Dry Clean SW001618 Smartwool Men's Performance Hike Socks -Full Cushion/Crew Length (Light Grey 039)